New planar prediction mode

An apparatus configured to decode a video signal in intra planar prediction mode, the apparatus comprising:

• an intra predicting unit configured to:
• predict a video data sample included in a current block based on a bi-linear interpolation using a first reference sample, a second reference sample, a third reference sample, and a fourth reference sample,
• the first reference sample being a left neighboring sample of the current block and having a same y-coordinate as the video data sample,
• the second reference sample being an upper neighboring sample of the current block and having a same x-coordinate as the video data sample,
• the third reference sample being a reference sample taken from an upper-right neighboring block of the current block and positioned in the same y-coordinate as the video data sample within a rightmost column of the current block for the bi-linear interpolation, and
• the fourth reference sample being a reference sample taken from a lower-left neighboring block of the current block and positioned in the same x-coordinate as the video data sample within a bottommost row of the current block for the bi-linear interpolation;
• and
• reconstruct the video data sample based on the predicted video data sample,
• wherein, a weighting factor applied for the third reference sample is determined based on the x-coordinate of the video data sample.

A method for encoding a video signal by an encoding apparatus in intra planar prediction mode, the method comprising:

• predicting a video data sample included in a current block based on a bi-linear interpolation using a first reference sample, a second reference sample, a third reference sample, and a fourth reference sample,
• the first reference sample being a left neighboring sample of the current block and having a same y-coordinate as the video data sample,
• the second reference sample being an upper neighboring sample of the current block and having a same x-coordinate as the video data sample,
• the third reference sample being a reference sample taken from an upper-right neighboring block of the current block and positioned in the same y-coordinate as the video data sample within a rightmost column of the current block for the bi-linear interpolation, and
• the fourth reference sample being a reference sample taken from a lower-left neighboring block of the current block and positioned in the same x-coordinate as the video data sample within a bottommost row of the current block for the bi-linear interpolation;
• and
• encoding the video data sample based on the predicted video data sample,
• wherein, a weighting factor applied for the third reference sample is determined based on the x-coordinate of the video data sample.

An apparatus configured to encode a video signal in intra planar prediction mode, the apparatus comprising:

• an intra predicting unit configured to:
• predict a video data sample included in a current block based on a bi-linear interpolation using a first reference sample, a second reference sample, a third reference sample, and a fourth reference sample,
• the first reference sample being a neighboring left sample of the current block and having a same y-coordinate as the video data sample,
• the second reference sample being an upper neighboring sample of the current block and having a same x-coordinate line as the video data sample,
• the third reference sample being a reference sample taken from an upper-right neighboring block of the current block and positioned in the same y-coordinate as the video data sample within a rightmost column of the current block for the bi-linear interpolation, and
• the fourth reference sample being a reference sample taken from a lower-left neighboring block of the current block and positioned in the same x-coordinate as the video data sample within a bottommost row of the current block for the bi-linear interpolation;
• and
• encode the video data sample based on the predicted video data sample,
• wherein, a weighting factor applied for the third reference sample is determined based on the x-coordinate of the video data sample.